Just to digress for a moment, I will tell you that hardly anything you learn in university will be applicable to anything in business and in life....
I make sure I fully understand a product and it's target audience, and know that the product is high quality before I even think about promoting...
I think you may have a hard time finding a quality plugin that does what you are looking for thats free. If you do, be sure to post it here...
Have you checked out WPReviewEngine? I can't post links here yet, but just Google "WPReviewEngine"
The reason I answered the way I did is because I don't think the time it takes for a site to sell is solely based on a niche. There are some...
In my experiences, any site that has sustainable traffic (SEO, etc) and a little bit of income will sell fast, as long as the price is right....
Why not do both? Buy and develop your own domain, and build a Squidoo page to point to it?
Separate names with a comma.